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Inorganic Nanocrystals with Dendrimer Templates: Mesoscopic Model System and Route to New Nanocomposites

Published online by Cambridge University Press:  21 March 2011

Franziska Gröhn ,
Barry J. Bauer  and
Eric J. Amis
Franziska Gröhn
Affiliation:
Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Barry J. Bauer
Affiliation:
Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Eric J. Amis
Affiliation:
Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
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Abstract

We investigate nanostructures that are formed when dendrimers act as hosts. Poly(amidoamine) (PAMAM) dendrimers can be used as templates for inorganic nanocrystals, both in aqueous solution1-3 and in a polymeric matrix4. SANS, SAXS and TEM are used to characterize the resulting hybrid structures. Different inorganic colloids like noble metal and cadmium sulfide colloids are studied1,2. With increasing dendrimer generation, we observe a transition from low molecular colloid stabilizing to an effective polymer templating in terms of a “host-guest nanoscale synthesis”. For these higher generation dendrimers, inorganic colloids are formed inside single dendrimer molecules and the size of the nanocrystal can precisely be controlled by the dendrimer generation (“fixed loading law”). Hydrophobically modified dendrimers in organic solvent represent a further, different kind of host system that we have investigated using scattering methods5.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y1.2
Copyright
Copyright © Materials Research Society 2001

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References

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